Update branding to preview5 in release/3.0

Author: wtgodbe

dependencies.props

@@ -21,7 +21,7 @@
     <StabilizePackageVersion Condition="'$(StabilizePackageVersion)' == ''">false</StabilizePackageVersion>
     <StableVersion Condition="'$(StabilizePackageVersion)' == 'true' and '$(StableVersion)' == ''">$(PackageVersion)</StableVersion>
 
-    <PreReleaseLabel>preview4</PreReleaseLabel>
+    <PreReleaseLabel>preview5</PreReleaseLabel>
   </PropertyGroup>
 
   <!-- Source of truth for dependency tooling: the commit hash of the dotnet/versions master branch as of the last auto-upgrade. -->

eng/Versions.props

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <!-- This repo version -->
     <VersionPrefix>3.0.0</VersionPrefix>
-    <PreReleaseVersionLabel>preview4</PreReleaseVersionLabel>
+    <PreReleaseVersionLabel>preview5</PreReleaseVersionLabel>
     <!-- Opt-out repo features -->
     <UsingToolXliff>false</UsingToolXliff>
     <UsingToolNetFrameworkReferenceAssemblies>true</UsingToolNetFrameworkReferenceAssemblies>